Nonskid and traction device



A. JOHNSON AND 0.. LANDHOLM.

NONSKID AND TRACTION DEV |CE. APPLICATION FILED MAY 19, 1921.

Patehted Feb. 28, 1922.

2 SHEETS-SHEET A. JOHNSON AND LANDHOLM. NONSKID AND TRACTION DEVICE. APPLICATION FILED MAY19| 192l- I 1,408,004. I I Patented Feb. 28, 1922.

2 SHEETS-SHEET 2.

di wwaf J Qaaarjavzd/azm I arithskid UNITED STA TES PATENT OFFICE.

UGusT JOHNSON, on DEE]? GREEK, WASH- nemon, Ann oscnn Lannnomi, on 1 ALLACE, B34110.

NONVSKID AND TRACTIQNIDEVIGE.

1;4os=,oo4,

Application filed May 19,

I of Spokane and State of Washington, and in Wallace, in the county of Shoshone and State-ofIdaho, respectively, have invented new, and-useful "Improvements ina Nonskid and Traction Device, of which the followin ista specification.

T his inventionrelates to improvements in and traction devices for vehicle Wheels;

. :It is one of the obj ects :of I this invention to provide afdevice of-this character composed of a-plurality -of-itransversely curved or archedftread-sections :each having one {or more non-skid flanges extending-longitudially. the ofaa d a "singl t ct nfian'g extending transversely along one end 11e e f,--- I s It is a feature of this invent-ion to -arch the I Ql 1sk-i d flanges in I StlCh Et" manner that the gtpexes ithereofwill be disposed .vClICU-Illfenen ia ly/ *i'rnidw-ay be een oppo ite e tioniflanges of gafdjacent sections so that when the --.wheelis-revolying the equally disposed apex s t u hing the gr und ll u ly support-the Wheehandthereby eliminate jars an 'd jolts. ln-thiscomectioll, it is a feature. of the invention -.to 1 have the non-skid and. traot-ionifianges of-uniform' radial height. In th-is novel constnuetion where each unit has only one traction flange at 1 one end thereof, it is feature toareh the non-skid flanges sornewhat off center with respect togtheirl'engt-h and-with respect to the length oftl e section, anddi sposing theapex toward that enfd reinote from i the traction flange, a suiiioient-distance to locate suchapex mid- Waiy-betweenthe traction flanges.

t is a further object ,of this invention to provide tread sections of skeleton form, the said skeleton members being united with eachother and withthe traction andsnonr skid fiangesli-n sueh a manner as toifor rn extremely rigid frame forthe sections and greatlyreduce the weight thereofas compared totread-sections of-solidformation. f

piIt isaifurther ohject ofthis inventionto pivotallyzunite the tread. sectionslwith each other in end {to end relation circumferentially about thewheeltread, each section having atone end thereof a pair of retaining arms embracing lateral portions of the wheel Specification of Letters latent. P t t d Feb, 2 92a 1921. Serial No. 470,800.

tread and extending radially inwardly therealong from the tread-sections. It is a feature to connect the arms of adj acent-tread sections by means of links wherebyythe retainlng feature will be rendered more;effeotive. f i It a further feature of 1 this invention to prp e 1 ov m a f tig e ng an etaming the tread sections in position on thje wheeltread; I I I A further feature consists in formingthe tread sections in such a manner that they may: be readily folded orcollapsed withthe sections insuperimposed relation. d

Other features-and ob ects will be more fully described in connection with the ac companying drawings and will be more 3 pa ticularly .pointedout in and bylthe appended claims. I

In the k lrawings:-- v z I I Eigure 1 l is. a view 'in 1 side elevation of a portion of a wheel showinglthe improveddevice vin position. thereon.

I FigureQ, is an venlargedQplan viewof one complete sectionanda portion of'another,

looking: down were same.

of, the sections.

line A 41 of Figure' 2. I t

Figure 5, is avviewof the means for tight;

ening thezdevice.

Figure 6 is aperspective view of one of the links usedintighteningthe device.

FigureZ, is a View showing how the sections can be" folded in superposed relation.

Like characters. of reference designate similarparts throughout the different fig ures or the drawings.

tireto whieh the device-of the invention maybe applied. Our device consists ,of a series of transversely arched or curved tread sections 2, each section' having one or more longitudinally disposed proj ecting flanges f3 and 4t, tjogprevent side skidding and each. sec tionalso' having at only one end thereof,

'. Asillustrated, 1 designates any form of Fignre 3,-is a bottoin plan viewof gone Figure 4, 1sa transverse sectional viewon a transversely disposedftraction flange. As

will later appear in the more specifiode scripltion, the flanges are centrally disposed with respect to the width of the section, the flanges let being laterally arranged on opposite sidesof the flanges 'One of the i1 nportant features of -the invention is that the radially highest or apex point of each flange 3 is midway between opposite traction flanges 5, circumferentially of the wheel, Therefore, on a hard surface, and with these projecting portions 3 and 5 of the same radial height, as they are, and which is also a feature, the vehicle will not be subjected to a series of jars and jolts as the wheel revolves. Of course, on a soft road surface all the flanges would sink in to a certain extent wholly dependent upon the character of the road. It will be seen that in a "softroad, the transversely extending traction flanges 5 will be extremely effective in lending traction and spinning;

I will next refer more particularly to the secured by rivets 9 to a transversely dis-v posed retaining arm forming strip 10, there by forming a rigid skeleton frame structure of a strength greatly in excess and in flexibility as compared'to a solid'tread sec-,,

tion of the same weight; The endsof the strip 10,as shown at 11 project radiallyiin wardly and serve to embrace the tread of thewheel as shown in Figuresl and4, the latter being shaped more especially in accordance with a solid truck tire. Linksf12 are pivoted to each otherat 13, and are-piw,

oted at 14 to .the arms 11, and serve to con met the arms of adjacent sections. One of the functions of this part of thestructure is to stabilize and help to stiffen the traction flanges 5 when the latter are under great traction stress, as will be clearfrom reference to Figure 1. A. further feature of this part of the structure is to serve" as a retainer to embrace the sides of the tread and thereby serve to prevent the tread sections from slipping off from the tire laterally. At'suitable intervals, straps 15 may be employed to extend about the felly 16, although this is not a claimed feature of the invention.

i life will next describethe construction and disposition of the non-skid i and traction flanges. I i p Flange 3 is mounted upon the middle strip 6 "and is provided with a base'flange 17 of a .greater length'than the flange 3, one end of said flange 17 being secured by'onelof the rivets 8, to the strip 7, and the other end being secured by one of the rivets 9. Throughout its length between said rivets theflange 17 rests upon middle strip 6. Flanges each have similar base flanges 18, resting on outer strips 6 and having their endssecured by rivets 8 and 9 thereby furpreventing the wheel from ther strengthening the skeleton frame section. The traction flange 5 hasa baseflange 19 which is superimposed upon the ends of flangesl? and 18 and is secured by rivets ,9. Thus the strip 10 is interposed and secured between the ends of strip 6, the flanges 17 and 18 and the flange :19, thereby giving the traction flanges a'very =secure anchorage' structure at their end of each section. Furthermore, this construction strengthens the strip 10 in such -a manner as to lend greater rigidity to arms 11. It

will now be clear how the connected arms 11 serve to stiffen" the traction flanges against being tilted under heavy traction stress.

Adjacent ends 'oftheasections are pro vided with butts 20 and "21 through which pintles 22 and 23 extend and from which they are withdrawable. A'link24 is provided with butts 25 and 26 whereby thetread sec tions may be'pivotally united inend mend relation. "The link 24 is of suflicient length so that when it is folded up along sideof the traction'fiange 5, it' wil'l permit one seceonm foldo-ver in superimposed'relation with the companion section, as shown in the -This' is aspecial feature collapsed figure. of the -invention. a i r 'Referen'cewill nextbe inadeto the ma'n nor in which the sections are drawn taut,j reference being had more particularly Figures 5 and 6.

On one end-most'sectionis a connecting bar 27 which may be pivotedfltothebutts 20 by a pintle 28. The bar has notches29, any

one of which may engage with' a pin 30,011 a flange 3 of the remaining en'd-mostsec 7 tion. A bail 31 may beextended about thehooked end 32 of a lever33. The terminal ends of thejbailmaybe hooked into the skeleton structure of one end-most section.

A similar bail-;34, connected bya'suitable chain 35 with said lever will serve to draw the sections together when the lever ismoved in the direction of the arrow.

It is believed that the device/of thiSziIlvention-will be fully understood from the' foregoing description, and while we have herein shown and described one'specific form of our invention, we'do not "wish 'tobe lim ited thereto except for such limitations as the claims may import. 1 We claim:+-v 1. A traction/and. non-skid 'device for wheels, comprising a series of transversely curved tread sections, links connecting said arched. tread sections, each section having a non-skid flange extending lengthwise thereof and each section having a transversely disposed traction flange at one end thereof, the apices of said non-skid and traction flanges being equally spaced apart circumferentially and of the same radial height thereby reducing jolting vibration as the vehicle Wheel turns.

3. A traction and nonskid device for wheels, comprising a series of connected and transversely arched tread sections, each section having a longitudinally disposed nonskid flange, a transversely disposed traction flange on only one end of each section, each non-skid flange being arched to dispose its apex circumferentially mid-way between the traction flange of its section and the traction flange of the next adjacent section.

4. A traction and non-skid device for vehicle Wheels comprising a series of skeleton and transversely arched sections each comprising longitudinally disposed frame strips, a transverse frame strip connected with said longitudinal frame strips at one end of the section, a retaining arm forming strip connected with said longitudinal strips at the other end of said section and having its ends extending radially inwardly of the Wheel tread to form retaining arms, longitudinally disposed non-skid flanges having base flanges superimposed on said longitudinal frame strips and secured to the frame at opposite ends, and a transversely disposed traction flange having a base flange superimposed on and secured to said retaining permitting one section to be folded in superposed relation with respect to the next section.

In testimony that We claim the foregoing as our own, we hereby aflix our signatures.

AUGUST JOHNSON. OSCAR LANDHOLM 

